Specifications
MIL-STD-]472E
5. DETAILED REQUIREMENTS
5.1 Control-disdaY intimation.
5.1.1 General criteria.
5.1.1.1 Relationship. The relationships of a control to its associated display and the display to
the control shall be immediately apparent and unambiguous to the operator. A mttml should be
located adjacent to (normally under or to the right of) its associated display and positioned so that
neither the control nor the hand normally used for setting the control will obscure the display.
5.1.1.2 Elm Contrcddisplay relationships shall be apparent through proximity, sWty of
groupings, coding, tlaming, labeling, and similar techniques.
5.1.1.3 Comtkxity and umcision. The eotnplexity and preeision required for control
manipulation and display monitoring shd be consistent with the precision required of the system.
Control-display complexity and precision shall not exceed the operator’s capability to discriminate
display detail or manipulate controls (in terms of manual dexter@, coordination or reaction time) under
the dynamic conditions and environment in which human performance is expected to occur.
5.1.1.4 Feedback Feedback of control response adequaey shall be provided quickly.
Feedback shall be intrinsic
or extrinsic to ind]cate (without ambiguity, uncertainty, or error) to the
operator that the control is properly actuated, that the desired response is achievei and when the
desired response is complete. Critical control fictions, such as those entered by keyboard, shall
provide f-k to the opemtor prior to entry to erwum
that the keyrxl eng is erroriess and the one
that the ojmitor desires to enter,
5.1.1.5 Ilhuninat.ion. Adjustable illuminabn
shall be provided for visual disp~ays(including
display, control, and panel labels and eriticid maddngs) that must be read under darkened conditions.
5.1.1.6 %mhaneousaecess. lfmomti~~-bmwkvetid-u~~
a group of controls or displays to ensure proper functioning of a system or subsystenL the operator
asaigxd to control and monitor that finction or group of related fbnctions shall have physied and
visual ~ to all controls, displays, and communication capability neeessary to adequately pcrfonn
assigned tasks.
5.1.2 Position relationships.
5.1.2.1 Functiodmwping.
Fudoadly dafaduxtdsaad dispiaysshd lbekakddoseto
eaeh other and arranged in fictional group%e.g., power, status, test.
5.1.2.1.1
Functional ~rou~arrarwement.
5.1.2 .1.1.1 Sequence Functional groups of
controls and displays shall be located to provide
for left-to-right (prefemed) or top-to-bottom order of use, or both.
5.1.2 .1.1.2 Access Providing that the integrity of grouping by fimction and sequence is not
compromised,
the more frequently used groups and the most im
r
rtant groups should be located in
areas of easiest access (’rmtrol-diy-ky groups required solely
w maintenance purposes shall be
located in pwitions providing a Ies.serdegree of access relatwe to operating groups.
5,1 ‘). 1.1.3 ~~f.ti~nal ~~~~ m~~~
Functional groups may be set apart by outlining with
contrasting lines which wmplctcly cnwmpa.ss the grwps. Where such coding is specitied h)’the
procurinp activity. nnd wherr :rav pmels are used. noncriltcal functional groups (i.e.. those not
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